One possible reason is that DHI effects may involve variables that are sensitive to unknown, uncontrolled, or uncontrollable factors.
This may be important to the riverine "wait and burst" feeding style of AJC, which may involve more variable levels of feeding activity.
Co-evolution between the information users and sources in different populations may involve a variable series of adaptations and counter-adaptations leading to ever more intricate patterns of social information use.
In terms of agricultural dairy buildings, the modelling of ventilation rates may involve in several variables, including the opening sizes at side walls and the outdoor wind conditions.
We searched for articles using electronic retrieval based on the keywords "variable selection", "variable screening", and "multivariable", and hand searched all articles that were not selected electronically in order not to miss any articles that may involve selection of variables.
A lack of monophyly is of particular concern in biotype research where investigators are commonly expected to recommend strategies to manage the frequency of virulence, which may involve manipulating environmental variables to decrease selective pressure favoring virulence (Onstad 2007).
This may simply involve using the previous 12, 24 or 36 months (whole units of year needed to account for seasonal variation) of data for the purpose of determining expected risk with the same adjustment variables, or it may involve revisiting model development and adjusting variables in the model as necessary.
These optimization problems are characterized by the nonconvexity of the feasible domain or the objective function and may involve continuous and/or discrete variables.
If some of these grouping variables have several categories (e.g. the translation used), this may involve several tests for each variable.
The process of variable selection may involve stakeholder participation, thus promoting popular participation in the study.
